Home / 3,131.60-4,320.59-1,855.58

Finding the Fourth Proportional to 3,131.60, 4,320.59 and 1,855.58

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Solution

The fourth proportional to 3,131.60, 4,320.59 and 1,855.58 is: 2,560.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.60 : 4,320.59 = 1,855.58 : x
  2. Step 2: Convert to fraction form
    3,131.60/4,320.59 = 1,855.58/x
  3. Step 3: Cross multiply
    3,131.60x = 4,320.59 × 1,855.58
  4. Step 4: Simplify right side
    3,131.60x = 8,017,169.51
  5. Step 5: Solve for x
    x = 8,017,169.51/3,131.60
  6. Step 6: Final answer
    x = 2,560.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.